Marcel A. Caminer; Santiago R. Ron, Systematics of treefrogs of the Hypsiboas calcaratus and Hypsiboas fasciatus species complex…
“ The coloration of the flanks and hidden surfaces of thighs vary from pale cream to creamy white or gray, with dark brown blotches. There is variation in the distribution of blotches on flanks; the extent covered by the blotches ranges from groin to the mid-flank (e.g., QCAZ 28004) or to the axilla (e.g., QCAZ 55374) . In some individuals, similar blotches can also be present on the hidden surfaces of the shanks, ventral surfaces of the forelimbs, and dorsal surfaces of the feet (e.g., QCAZ 43825) . In few individuals, the dark blotches of the thighs and flanks are faint (e.g., QCAZ 43897) . ”
